After choosing not to attend voluntary workouts last week, Sprewell showed up at news media day on Monday with a swollen right hand.
After the tentative deal was reached, owners allowed players to have voluntary workouts at team sites starting December 1.
His teammates have noted Pennington's efforts during the team's voluntary workouts.
Not all 25 players participated in today's voluntary workout; the first mandatory one is scheduled for Friday.
Although pitchers and catchers began voluntary workouts 10 days ago, the mandatory date for all players to begin workouts isn't until Wednesday.
But one part of the voluntary workout seemed slightly unusual: the coach in charge obviously did not want the shots to go in.
Besides the extra scholarship money for athletes, he called for "more comprehensive year-round insurance coverage that would include 'voluntary' workouts."
He attended some, but not all, voluntary workouts during the off-season, but was praised for an improved attitude by fellow members of the football program.
Only about a dozen players took part in a voluntary, indoor workout.
He was signed by the Jaguars as a free agent in April 2013, after a tryout during voluntary workouts.